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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8005) Erasure Coding: simplify striped block recovery work computation and add tests
Date Mon, 30 Mar 2015 20:13:53 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14387319#comment-14387319
] 

Jing Zhao commented on HDFS-8005:
---------------------------------

I think the current {{chooseSourceDatanode}} is fine. There is no need to have a separate
function for striped blocks.

> Erasure Coding: simplify striped block recovery work computation and add tests
> ------------------------------------------------------------------------------
>
>                 Key: HDFS-8005
>                 URL: https://issues.apache.org/jira/browse/HDFS-8005
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>         Attachments: HDFS-8005.000.patch, HDFS-8005.000.patch, HDFS-8005.001.patch
>
>
> HDFS-7369 adds the functionality to distribute recovery work of striped blocks to datanodes.
There are still some pending issues:
> # In {{BlockManager#chooseSourceNode}}, a node is added into {{healthyIndices}} without
checking if its block is live and healthy
> # The test {{TestRecoverStripedBlcoks#testMissingStripedBlock}} has not tested striped
blocks because the file is created before setting the storage policy
> # In {{computeRecoveryWorkForBlocks}}, instead of using {{BlockCollection#isStriped}},
we'd better use {{BlockInfo#isStriped}}



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